2) Add your valid .mil email address to your Google Account
3) Click on the Call phone link at the top of the Gmail chat roster and install the voice and video Gmail plugin if you haven’t already.
4) Click on the Call phone link again to initiate a call.

You are all set.

*** NB ***
- You can now also make free video calls to other Gmail users.
- Friends in the USA can make telephone call to troops abroad for as little as $.02/ minute, by setting up a Gmail account.